[ASan/Win] Catch NULL derefs and page faults

Reviewed at http://reviews.llvm.org/D4471

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@212807 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Print register values in a consistent way

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@212809 91177308-0d34-0410-b5e6-96231b3b80d8